Location: Karachi, Hyderabad, Sukkur, Mirpur Khas, Khairpur, Quetta, Rawalpindi, Taxila, Islamabad, Lahore, Peshawar, Gujrat, Vehari, Jhang
Timing: 7:00 am to 9:00 pm
Date: 27 September, 2021
Description: Chehlum is a Shiite religious observance that occurs forty days after the Day of Ashura. Due to security concerns and law & order condition, the mobile services were suspended in all major cities of Pakistan
Source: Media and locals
Kill Switch 2021 Timeline